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Rifles, Reloading, Optics, Equipment
Gunsmithing
Turn down barrel contour?
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<blockquote data-quote="J E Custom" data-source="post: 1137244" data-attributes="member: 2736"><p>In theory any dimensional changes are possible under the right/wrong conditions.</p><p></p><p>If a barrel Is not "properly stress relieved" or is not contoured true to the bore bad things can happen. The barrel diameter change will be so minimal that it will be almost impossible to detect,</p><p>but barrel straightness will show up.</p><p></p><p>In my opinion buttoned rifle barrels are least likely to have any dimensional changes because they are double stressed relieved (Once before any work is done from the mill, and then again after it is buttoned and contoured to relieve the forging stress.</p><p></p><p>Cut rifling is only stress relieved at the mill because the cut rifling does not apply any more stress.</p><p></p><p>I recommend buying a barrel contoured and/or fluted from the barrel maker because it has met the straightness and diameter requirements before it is shipped if possible. but if modifications are necessary then they should be done with forethought and the best quality possible. </p><p></p><p>Like everything, the quality of the barrel and any work after can have an effect on It's performance</p><p>so if a barrel is not one of the premium barrels and the bore is not true and straight, I decline any work to avoid future problems. As one of the sages on this site says "It is hard to make a silk purse </p><p>out of a sows ear".</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1137244, member: 2736"] In theory any dimensional changes are possible under the right/wrong conditions. If a barrel Is not "properly stress relieved" or is not contoured true to the bore bad things can happen. The barrel diameter change will be so minimal that it will be almost impossible to detect, but barrel straightness will show up. In my opinion buttoned rifle barrels are least likely to have any dimensional changes because they are double stressed relieved (Once before any work is done from the mill, and then again after it is buttoned and contoured to relieve the forging stress. Cut rifling is only stress relieved at the mill because the cut rifling does not apply any more stress. I recommend buying a barrel contoured and/or fluted from the barrel maker because it has met the straightness and diameter requirements before it is shipped if possible. but if modifications are necessary then they should be done with forethought and the best quality possible. Like everything, the quality of the barrel and any work after can have an effect on It's performance so if a barrel is not one of the premium barrels and the bore is not true and straight, I decline any work to avoid future problems. As one of the sages on this site says "It is hard to make a silk purse out of a sows ear". J E CUSTOM [/QUOTE]
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Turn down barrel contour?
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